I can't say how well of a condition your cylinder walls are just by looking at them except that they have lost all of the cross hatch from wear. Can you feel a lip near the top where the piston ring stops it's upward travel and starts to go back down into the cylinder?(Top Dead Center) Commonly refered to as a ring ridge. If you can feel it with your fingernail you need to get an "inside" Micrometer or a bore gauge and take some measurements and refer to an overhaul manual to find out what the acceptable tolerance or wear limit is.
I know you have difficulties getting parts economically, but if you can feel a ridge, it may be time for an overbore and new pistons. If it was measuring 159.5418 POUNDS PER SQUARE INCH I'd say it was in pretty good shape. If you talking about pascals or something else I couldn't say one way or the other. I know they all didn't measure the exact same amount, but generally if they all measure within 10 percent of one another they should be ok.
No the heads I posted a pic of were not swirl port heads. I was just trying to give you an idea of what to get the guides to look like instead of having the big vane. You asked for a pic and thats all I had.
ssmonty
I take too long to type. I see that painted jester beat me to it.

I can't say how well of a condition your cylinder walls are just by looking at them except that they have lost all of the cross hatch from wear. Can you feel a lip near the top where the piston ring stops it's upward travel and starts to go back down into the cylinder?(Top Dead Center) Commonly refered to as a ring ridge. If you can feel it with your fingernail you need to get an "inside" Micrometer or a bore gauge and take some measurements and refer to an overhaul manual to find out what the acceptable tolerance or wear limit is.
I know you have difficulties getting parts economically, but if you can feel a ridge, it may be time for an overbore and new pistons. If it was measuring 159.5418 POUNDS PER SQUARE INCH I'd say it was in pretty good shape. If you talking about pascals or something else I couldn't say one way or the other. I know they all didn't measure the exact same amount, but generally if they all measure within 10 percent of one another they should be ok.
No the heads I posted a pic of were not swirl port heads. I was just trying to give you an idea of what to get the guides to look like instead of having the big vane. You asked for a pic and thats all I had.
ssmonty
I take too long to type. I see that painted jester beat me to it.

hello no i didnt get the pistons out .. like i said its my first project so onley the heads ported and new cam .. and clean up everything.. if you feel on the edge of the cylinder wall you can feel a little ridge on it .. but onley the dark ridge .. its not much and by looking the piston isnt touching it at all..

i looked a few days ago on the internet and I found a few pages that says that an interference fringe an accepted phenomenon .. but what will happen when I let it sit there is not a scratch or feel visible in the cylinder wall .. there was on that edge a little black attack like the pistons .. I HBE and edge gently cleaned the pistons also schooingeborsteld .. I have the pistons leave because this is my first project and I still do not know everything and I piston rings and bearings risky find ..

mn engine has basically always nice run. but had a leaky koppaking. and did only what cylinder machining done and everything cleaned e camshaft replacement for others

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